Hello,
Restart Origin, and battlelog. And try again, if it didn't work, try restart you computer. Or you can try:
1st: Press: Windows + R and type %temp% and then delete all insides
2nd: Press Windows + R type msconfig and disable startup programs and all non ms windows services
3th: Find you origin and bf3 file and set them running as administrator and with Windows 7 compalible
4th: after you are colsing your new game, you have always 1st to kill the: EACoreServer.exe process otherwise your bf3.exe process - if started again might stuck.
Regards, Libever